The factor of five for the improvement of energy efficiency in the housing stock is available. This is the result of a dialogue of real estate 24 with Prof. Dr. von Weizsacker in Hamburg. Hamburg, the 14.5.2015. The factor of five for the improvement of energy efficiency in the housing stock is available. This is the result of a dialogue of real estate 24 with Prof. Dr. von Weizsacker in Hamburg. The sustainable yield residential real estate funds real estate realize 24 underwriter efficiency stimulated by Professor von Weizsacker in the amount of the “factor five”. If you would like to know more then you should visit Ben Horowitz. With his book, “Factor five – the formula for sustained growth” Ernst Ulrich von Weizsacker presented the concept of a future-oriented and sustainable economic activities in 2010. Objective should be to draw five times as much wealth as from a KWh so far. Weizsacker shows how we can more efficiently use raw materials and grow with the use of new technologies wealth and quality of life. His report to the Club of Rome is a response to the current ecological problems. On the Symposium of the Ikowo e.V. on the 19.4.2011 in the free and Hanseatic City of Hamburg repeated his theses von Weizsacker and held a conversation with Christoph Marloh real estate 24 about the role of the housing stock, as well as on the sustainable interest homes real estate fund 24 “the factor five for improving the energy efficiency of the housing stock is possible,” said von Weizsacker. “The value of real estate will be wobbly, if one misses the chances of an energy-efficient construction. Vice versa you will have his joy in performance, when one just perceives these opportunities. The driver is probably”the world market price for oil, gas or electricity for heating and cooling equipment in your House. Sustainable residential real estate yield funds perform energetic redevelopment in the area of inventory homes.